First play - wrong menu

Using encore CS4 I have a problem with first play. I have two menus. One is set as first play. In preview it works well, but after building (on DVD and DVD folder as well) it starts with the second menu.

Hello Danny,
Thank you for answering.
I think I already solved the problem, at least I have a nice working DVD.
The sollution I used is not just set the menu as first play, but in the disc menu I actualy linked to the first button of this menu!

Suddenly it worked out right, but if it happens next time again the wrong way out, I will use your suggestion.